please empty your brain below

Interesting breakfast reading. Of course it only works with an abbreviated year date format, the 13 figure is not /13 but /2013. So perhaps not such an exiting day after all, I'll go back to my porridge.
Although its a Bank Holiday in Scotland, the banks in Scotland are open because the Scottish Banks now observe English Bank Holidays. Just thought I'd throw that little bit of trivia in.
The Golden Ratio also applies to the dimensions of your credit card.
5/5 = 1.666666 ? dg writes: Oops. Fixed, ta.
The Golden Ratio also applies to the size of old fashioned foolscap paper (13x8 inches) but not to A4 and the rest of the ISO series (which is a whole other story).
It's also a Bank Holiday here in the Republic of Ireland (and the banks are closed).
Great post: I especially like the rabbits and steps analogies.
Golden ratio applies in the world of photography & video. When taking a picture/shot of someone, place their eyes in the in the part of the screen that is 1:1.61 across as well as it is up (or down), and you'll have "placed" the person in the most perfect positions - the one that is more pleasing to look at, even though you don't know why. But having their eyes at that part of the shot/screen makes a video/photo much more attractive than one that isn't.
You get the Golden Ratio in music too - I think Bartok used it to get the proportions for his pieces.
@geofftech

I can think of a few people that no matter where in the picture they are positioned you would call them "attractive" or "pleasing to look at".
Suppose there's this infinite staircase ...

Only a mathematician would start a sentence with that phrase.

Alan Turing did a lot of investigation of the mathematics in the living world. It is said that if he hadn't have been famous for all the other things he did he would have been famous for inventing the subject of mathematical biology.
The Fibonacci Sequence is also the name of a British chamber music ensemble with a very good reputation in the classical field.


Saw this post at 11:23 5/8/13 :-)
I think the rabbit example only works properly if the rabbits always produce a male+female pair. The equally probable (?) gender outcome of MM or FF will mess up the numbers, in the short run at least.

Simpler to suppose that each female rabbit produces one female offspring per month, and only count females throughout. Ignore the males, provided there's at least one available somehow.
Ha, got the 13th comment slot!
As a tediously studious 8 year old, I do remember marking 5/8/85 in my secret diary as a date which read the same backwards as it was forwards.
I have been trying to work out the significance of the link which tries to dial the Fibonacci number 2971215073 (if you still have an old-fashioned modem on your computer, as I do.)

Putting a zero in front of the aforesaid no. makes it into a Cardiff phone number, although one that is not currently in use.

There's one a bit further down the sequence that (assuming a leading zero) might belong to someone's mobile, but I haven't had the courage to call it and say 'Excuse me, but did you know that your phone is a Fibonacci number?'
Try reading Emily Gravett's book 'The Rabbit Problem' for an entertaining take on this.










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